Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures. Summary: IGDB
Mind Score
Fair to the playerAge · PEGI 18
Respect
92
Stimulation
lively
Has an endingStop anytime
What it exercises
Cooperation
- Steam store: Co-op
Medium confidence · 28 Sept 2026 · Rules-based estimate from the Steam store, player reviews and PEGI/ESRB descriptors. Not a substitute for the official rating or your own judgement. Tap a label to see the evidence.